//#define _CRT_SECURE_NO_WARNINGS 1
//#include<stdio.h>
//int main()
//{
//	int thief = 0;
//	for (thief = 'a'; thief <= 'd'; thief++)
//	{
//		if ((thief != 'a') + (thief == 'c') + (thief == 'd') + (thief != 'd') == 3)
//			printf("%c", thief);
//	}
//	return 0;
//}